RFID vs NFC — What's the Difference for Access Cards in Singapore?

You've probably heard both terms before — RFID and NFC. If you're trying to understand your access card, or figure out why your phone can detect some cards but not others, this guide explains it simply and practically in the context of Singapore access cards.

The Short Answer

NFC is a type of RFID. All NFC cards are RFID cards — but not all RFID cards are NFC. The key difference is frequency, range, and what the technology is used for.

For Singapore access cards, the practical difference comes down to this: 125kHz RFID cards (like EM4100) cannot be detected by your phone, while 13.56MHz NFC-compatible cards (like Mifare) can be tapped with your phone's NFC reader.

RFID vs NFC — Side by Side

What Does This Mean for Your Access Card?

Most Singapore access cards fall into one of two categories based on their frequency:

125kHz RFID cards — older buildings

Cards like EM4100 and HID Proximity use 125kHz RFID technology. These are the oldest and simplest access cards. Your phone's NFC scanner won't detect them because phone NFC only works at 13.56MHz.

These cards have no encryption, making them the fastest and cheapest to duplicate — from $10 in about 5 minutes.

13.56MHz NFC-compatible cards — newer buildings

Cards like Mifare Classic, Mifare DESFire, and HID iClass operate at 13.56MHz — the same frequency as NFC. Your phone can usually detect these cards when you tap them with an NFC reader app.

These cards use encryption ranging from basic (Mifare Classic, $15) to advanced AES-128 (HID iClass Seos, $45).

Access Card Types in Singapore by Technology

Why Does This Matter for Duplication?

The technology inside your card determines how complex — and how expensive — it is to duplicate:

• 125kHz RFID cards — no encryption, read and copy in 5 minutes from $10
• 13.56MHz Mifare Classic — standard encryption, 10–20 minutes from $15
• 13.56MHz Mifare DESFire — AES encryption, 20–30 minutes from $35
• 13.56MHz HID iClass — highest security, 30–45 minutes from $45

Not sure which technology your card uses? The phone NFC test is a good first step. For a definitive answer, visit our Access Card Types Guide or WhatsApp us a photo.

Can I Use My Phone as an Access Card?

If your building uses 13.56MHz NFC technology, it may be possible — depending on how the access system is configured. Some buildings support phone-based access via their app or NFC-enabled devices.

For most Singapore residential buildings, the simpler solution is to get a phone sticker duplicate — an NFC sticker programmed with your card data that sticks to the back of your phone. It works exactly like your original card, just attached to your phone.